US Patent 7980218 Pump driving device in engine

Patent 7980218 was granted and assigned to Honda on July, 2011 by the United States Patent and Trademark Office.

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Is a

Patent

Patent attributes

Current Assignee

Honda

Patent Jurisdiction

United States Patent and Trademark Office

Patent Number

79802180

Patent Inventor Names

Masanori Tsubouchi0

Date of Patent

July 19, 2011

Patent Application Number

118060730

Date Filed

May 29, 2007

Patent Primary Examiner

‌

Thomas N. Moulis

Patent abstract

In a pump driving device in an engine, driving a pump shaft of a pump mounted to an engine body by a valve-operating cam shaft supported by the engine body, a bolt is threadedly engaged with one end of the cam shaft, the bolt having a head portion in which a polygonal hole is formed, and a polygonal shaft portion is formed at one end of the pump shaft so as to be fitted into the polygonal hole. The pump shaft is driven by the cam shaft via the polygonal hole and the polygonal shaft portion. Thus, a large driving torque can be transmitted from the cam shaft to the pump shaft without reducing any effective support surface of a journal portion of the cam shaft.